diff options
| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2009-12-13 13:37:06 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2009-12-13 13:37:06 +0000 |
| commit | 6716159ba1186d9360d80b4b2313b3a047055295 (patch) | |
| tree | b7208b66427d8d6afba2f6b54cb4000a63a3bead /os/hal/platforms/STM32/pwm_lld.c | |
| parent | 8b165fe3e29168a029d48cd8089a3f2c836e7ee3 (diff) | |
| download | ChibiOS-6716159ba1186d9360d80b4b2313b3a047055295.tar.gz ChibiOS-6716159ba1186d9360d80b4b2313b3a047055295.tar.bz2 ChibiOS-6716159ba1186d9360d80b4b2313b3a047055295.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1423 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/platforms/STM32/pwm_lld.c')
| -rw-r--r-- | os/hal/platforms/STM32/pwm_lld.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/os/hal/platforms/STM32/pwm_lld.c b/os/hal/platforms/STM32/pwm_lld.c new file mode 100644 index 000000000..d816aa47a --- /dev/null +++ b/os/hal/platforms/STM32/pwm_lld.c @@ -0,0 +1,164 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file STM32/pwm_lld.c
+ * @brief STM32 PWM subsystem low level driver header.
+ * @addtogroup STM32_PWM
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if CH_HAL_USE_PWM || defined(__DOXYGEN__)
+
+/** @brief PWM1 driver identifier.*/
+#if defined(USE_STM32_PWM1) || defined(__DOXYGEN__)
+PWMDriver PWMD1;
+#endif
+
+/*===========================================================================*/
+/* Low Level Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level PWM driver initialization.
+ */
+void pwm_lld_init(void) {
+
+#if USE_STM32_PWM1
+ /* TIM1 reset, ensures reset state in order to avoid trouble with JTAGs.*/
+ RCC->APB2RSTR = RCC_APB2RSTR_TIM1RST;
+ RCC->APB2RSTR = 0;
+
+ /* Driver initialization.*/
+ pwmObjectInit(&PWMD1);
+#endif
+
+}
+
+/**
+ * @brief Configures and activates the PWM peripheral.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ */
+void pwm_lld_start(PWMDriver *pwmp) {
+
+ if (pwmp->pd_state == PWM_STOP) {
+ /* Clock activation.*/
+#if USE_STM32_PWM1
+ if (&PWMD1 == pwmp) {
+ NVICEnableVector(TIM1_CC_IRQn, STM32_PWM1_IRQ_PRIORITY);
+ RCC->APB2ENR |= RCC_APB2ENR_TIM1EN;
+ }
+#endif
+ }
+ /* Configuration.*/
+}
+
+/**
+ * @brief Deactivates the PWM peripheral.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ */
+void pwm_lld_stop(PWMDriver *pwmp) {
+
+ /* If in ready state then disables the PWM clock.*/
+ if (pwmp->pd_state == PWM_READY) {
+#if USE_STM32_PWM1
+ if (&PWMD1 == pwmp) {
+ NVICDisableVector(TIM1_CC_IRQn);
+ RCC->APB2ENR &= ~RCC_APB2ENR_TIM1EN;
+ }
+#endif
+ }
+}
+
+/**
+ * @brief Determines whatever the PWM channel is already enabled.
+ * + * @param[in] pwmp pointer to a @p PWMDriver object
+ * @param[in] channel PWM channel identifier
+ *
+ * @return The PWM channel status.
+ * @retval FALSE the channel is not enabled.
+ * @retval TRUE the channel is enabled. + */
+bool_t pwm_lld_is_enabled(PWMDriver *pwmp, pwmchannel_t channel) {
+
+ return (pwmp->pd_enabled_channels & (1 << channel)) != 0;
+}
+
+/**
+ * @brief Setups a PWM channel.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ * @param[in] channel PWM channel identifier
+ */
+void pwm_lld_setup_channel(PWMDriver *pwmp, pwmchannel_t channel) {
+
+}
+
+/**
+ * @brief Enables a PWM channel.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ * @param[in] channel PWM channel identifier
+ * @param[in] width PWM pulse width as clock pulses number
+ */
+void pwm_lld_enable_channel(PWMDriver *pwmp,
+ pwmchannel_t channel,
+ pwmcnt_t width) {
+
+ pwmp->pd_enabled_channels |= (1 << channel);
+}
+
+/**
+ * @brief Disables a PWM channel.
+ * @details The channel is disabled and its output line returned to the
+ * idle state.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ * @param[in] channel PWM channel identifier
+ */
+void pwm_lld_disable_channel(PWMDriver *pwmp, pwmchannel_t channel) {
+
+ pwmp->pd_enabled_channels &= ~(1 << channel);
+}
+
+#endif /* CH_HAL_USE_PWM */
+
+/** @} */
|